Chemical Engineering March 2019 - 35
Cover Story
on lines of NPS 8 and smaller. Nominal
Pipe Size (NPS) is a North American set
of standard sizes for pipes used for high
or low pressures and temperatures.
" Nominal " refers to pipe in non-specific
terms and identifies the diameter of the
hole with a non-dimensional number,
loosely based on the inner diameter
(ID) of the pipe in inches. The flowchart
in Figure 3 illustrates a common NDE
selection process for examining piping
for CUI [5].
Realtime radiography (RTR). Realtime
radiography (RTR) is also called fluoroscopy
[6]. Inspection personnel view the
silhouette of the pipe or vessel outer diameter
(OD) on a monitor as the location
is inspected (Figure 4). Corrosion products
form buildups on top of the OD.
Due to size limitations, this technique is
used more often on piping rather than
vessels. The technique is defined by its
radiation source and image intensifier or
detector. It does not require film. RTR
results in images such as those shown
in Figure 5. The maximum opening of
the arms on the equipment determines
FIGURE 7. Digital detector array (DDA)
radiography images are a quick way to
obtain inspection data
the largest diameter of the equipment
and insulation that can be inspected.
This has changed with time and will
likely continue to do so.
3452 BioN 7x4.875 ad_Layout 1 12/12/18 10:16 AM Page 1
Profile radiography with film; with
computed radiography (CR); and
with digital detector array (DDA) radiography.
Profile radiography (also
referred to as a shadow shot), as its
name implies, refers to a profile view
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MARCH 2019
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Chemical Engineering March 2019
Table of Contents for the Digital Edition of Chemical Engineering March 2019
Contents
Chemical Engineering March 2019 - Cover1
Chemical Engineering March 2019 - Cover2
Chemical Engineering March 2019 - Contents
Chemical Engineering March 2019 - 2
Chemical Engineering March 2019 - 3
Chemical Engineering March 2019 - 4
Chemical Engineering March 2019 - 5
Chemical Engineering March 2019 - 6
Chemical Engineering March 2019 - 7
Chemical Engineering March 2019 - 8
Chemical Engineering March 2019 - 9
Chemical Engineering March 2019 - 10
Chemical Engineering March 2019 - 11
Chemical Engineering March 2019 - 12
Chemical Engineering March 2019 - 13
Chemical Engineering March 2019 - 14
Chemical Engineering March 2019 - 15
Chemical Engineering March 2019 - 16
Chemical Engineering March 2019 - 17
Chemical Engineering March 2019 - 18
Chemical Engineering March 2019 - 19
Chemical Engineering March 2019 - 20
Chemical Engineering March 2019 - 21
Chemical Engineering March 2019 - 22
Chemical Engineering March 2019 - 23
Chemical Engineering March 2019 - 24
Chemical Engineering March 2019 - 25
Chemical Engineering March 2019 - 26
Chemical Engineering March 2019 - 27
Chemical Engineering March 2019 - 28
Chemical Engineering March 2019 - 29
Chemical Engineering March 2019 - 30
Chemical Engineering March 2019 - 31
Chemical Engineering March 2019 - 32
Chemical Engineering March 2019 - 33
Chemical Engineering March 2019 - 34
Chemical Engineering March 2019 - 35
Chemical Engineering March 2019 - 36
Chemical Engineering March 2019 - 37
Chemical Engineering March 2019 - 38
Chemical Engineering March 2019 - 39
Chemical Engineering March 2019 - 40
Chemical Engineering March 2019 - 41
Chemical Engineering March 2019 - 42
Chemical Engineering March 2019 - 43
Chemical Engineering March 2019 - 44
Chemical Engineering March 2019 - 45
Chemical Engineering March 2019 - 46
Chemical Engineering March 2019 - 47
Chemical Engineering March 2019 - 48
Chemical Engineering March 2019 - 49
Chemical Engineering March 2019 - 50
Chemical Engineering March 2019 - 51
Chemical Engineering March 2019 - 52
Chemical Engineering March 2019 - 53
Chemical Engineering March 2019 - 54
Chemical Engineering March 2019 - 55
Chemical Engineering March 2019 - 56
Chemical Engineering March 2019 - 57
Chemical Engineering March 2019 - 58
Chemical Engineering March 2019 - 59
Chemical Engineering March 2019 - 60
Chemical Engineering March 2019 - 61
Chemical Engineering March 2019 - 62
Chemical Engineering March 2019 - 63
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Chemical Engineering March 2019 - 65
Chemical Engineering March 2019 - 66
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Chemical Engineering March 2019 - 69
Chemical Engineering March 2019 - 70
Chemical Engineering March 2019 - 71
Chemical Engineering March 2019 - 72
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Chemical Engineering March 2019 - 74
Chemical Engineering March 2019 - 75
Chemical Engineering March 2019 - 76
Chemical Engineering March 2019 - Cover3
Chemical Engineering March 2019 - Cover4
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